Ah, when I first went to a big city back then, there were many things that were hard to get used to.

For example, where we're from, people say the dish is "sweet-idle" instead of "salty-bland". We say "salty-bland" differently - it's "sweet-idle"
Expensive, cheap - we say "expensive, lowly" (lowly = cheap)
Thank you - hardly anyone says it. After someone helps you, you have to say "okay, alright, sorry to trouble you", especially this - after someone helps me, I often just say "okay, okay" and then get scolded for being impolite, sigh
This stuff is really hard to figure out
After you get used to it though, it's fine